001 /* ===========================================================
002 * JFreeChart : a free chart library for the Java(tm) platform
003 * ===========================================================
004 *
005 * (C) Copyright 2000-2007, by Object Refinery Limited and Contributors.
006 *
007 * Project Info: http://www.jfree.org/jfreechart/index.html
008 *
009 * This library is free software; you can redistribute it and/or modify it
010 * under the terms of the GNU Lesser General Public License as published by
011 * the Free Software Foundation; either version 2.1 of the License, or
012 * (at your option) any later version.
013 *
014 * This library is distributed in the hope that it will be useful, but
015 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
016 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
017 * License for more details.
018 *
019 * You should have received a copy of the GNU Lesser General Public
020 * License along with this library; if not, write to the Free Software
021 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
022 * USA.
023 *
024 * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
025 * in the United States and other countries.]
026 *
027 * ------------------
028 * BarChartDemo1.java
029 * ------------------
030 * (C) Copyright 2003-2007, by Object Refinery Limited and Contributors.
031 *
032 * Original Author: David Gilbert (for Object Refinery Limited);
033 * Contributor(s): ;
034 *
035 * Changes
036 * -------
037 * 09-Mar-2005 : Version 1 (DG);
038 *
039 */
040
041 package org.jfree.chart.demo;
042
043 import java.awt.Color;
044 import java.awt.Dimension;
045 import java.awt.GradientPaint;
046
047 import org.jfree.chart.ChartFactory;
048 import org.jfree.chart.ChartPanel;
049 import org.jfree.chart.JFreeChart;
050 import org.jfree.chart.axis.CategoryAxis;
051 import org.jfree.chart.axis.CategoryLabelPositions;
052 import org.jfree.chart.axis.NumberAxis;
053 import org.jfree.chart.plot.CategoryPlot;
054 import org.jfree.chart.plot.PlotOrientation;
055 import org.jfree.chart.renderer.category.BarRenderer;
056 import org.jfree.data.category.CategoryDataset;
057 import org.jfree.data.category.DefaultCategoryDataset;
058 import org.jfree.ui.ApplicationFrame;
059 import org.jfree.ui.RefineryUtilities;
060
061 /**
062 * A simple demonstration application showing how to create a bar chart.
063 */
064 public class BarChartDemo1 extends ApplicationFrame {
065
066 /**
067 * Creates a new demo instance.
068 *
069 * @param title the frame title.
070 */
071 public BarChartDemo1(String title) {
072 super(title);
073 CategoryDataset dataset = createDataset();
074 JFreeChart chart = createChart(dataset);
075 ChartPanel chartPanel = new ChartPanel(chart, false);
076 chartPanel.setPreferredSize(new Dimension(500, 270));
077 setContentPane(chartPanel);
078 }
079
080 /**
081 * Returns a sample dataset.
082 *
083 * @return The dataset.
084 */
085 private static CategoryDataset createDataset() {
086
087 // row keys...
088 String series1 = "First";
089 String series2 = "Second";
090 String series3 = "Third";
091
092 // column keys...
093 String category1 = "Category 1";
094 String category2 = "Category 2";
095 String category3 = "Category 3";
096 String category4 = "Category 4";
097 String category5 = "Category 5";
098
099 // create the dataset...
100 DefaultCategoryDataset dataset = new DefaultCategoryDataset();
101
102 dataset.addValue(1.0, series1, category1);
103 dataset.addValue(4.0, series1, category2);
104 dataset.addValue(3.0, series1, category3);
105 dataset.addValue(5.0, series1, category4);
106 dataset.addValue(5.0, series1, category5);
107
108 dataset.addValue(5.0, series2, category1);
109 dataset.addValue(7.0, series2, category2);
110 dataset.addValue(6.0, series2, category3);
111 dataset.addValue(8.0, series2, category4);
112 dataset.addValue(4.0, series2, category5);
113
114 dataset.addValue(4.0, series3, category1);
115 dataset.addValue(3.0, series3, category2);
116 dataset.addValue(2.0, series3, category3);
117 dataset.addValue(3.0, series3, category4);
118 dataset.addValue(6.0, series3, category5);
119
120 return dataset;
121
122 }
123
124 /**
125 * Creates a sample chart.
126 *
127 * @param dataset the dataset.
128 *
129 * @return The chart.
130 */
131 private static JFreeChart createChart(CategoryDataset dataset) {
132
133 // create the chart...
134 JFreeChart chart = ChartFactory.createBarChart(
135 "Bar Chart Demo 1", // chart title
136 "Category", // domain axis label
137 "Value", // range axis label
138 dataset, // data
139 PlotOrientation.VERTICAL, // orientation
140 true, // include legend
141 true, // tooltips?
142 false // URLs?
143 );
144
145 // NOW DO SOME OPTIONAL CUSTOMISATION OF THE CHART...
146
147 // set the background color for the chart...
148 chart.setBackgroundPaint(Color.white);
149
150 // get a reference to the plot for further customisation...
151 CategoryPlot plot = (CategoryPlot) chart.getPlot();
152 plot.setBackgroundPaint(Color.lightGray);
153 plot.setDomainGridlinePaint(Color.white);
154 plot.setDomainGridlinesVisible(true);
155 plot.setRangeGridlinePaint(Color.white);
156
157 // ******************************************************************
158 // More than 150 demo applications are included with the JFreeChart
159 // Developer Guide...for more information, see:
160 //
161 // > http://www.object-refinery.com/jfreechart/guide.html
162 //
163 // ******************************************************************
164
165 // set the range axis to display integers only...
166 final NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
167 rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());
168
169 // disable bar outlines...
170 BarRenderer renderer = (BarRenderer) plot.getRenderer();
171 renderer.setDrawBarOutline(false);
172
173 // set up gradient paints for series...
174 GradientPaint gp0 = new GradientPaint(0.0f, 0.0f, Color.blue,
175 0.0f, 0.0f, new Color(0, 0, 64));
176 GradientPaint gp1 = new GradientPaint(0.0f, 0.0f, Color.green,
177 0.0f, 0.0f, new Color(0, 64, 0));
178 GradientPaint gp2 = new GradientPaint(0.0f, 0.0f, Color.red,
179 0.0f, 0.0f, new Color(64, 0, 0));
180 renderer.setSeriesPaint(0, gp0);
181 renderer.setSeriesPaint(1, gp1);
182 renderer.setSeriesPaint(2, gp2);
183
184 CategoryAxis domainAxis = plot.getDomainAxis();
185 domainAxis.setCategoryLabelPositions(
186 CategoryLabelPositions.createUpRotationLabelPositions(
187 Math.PI / 6.0));
188 // OPTIONAL CUSTOMISATION COMPLETED.
189
190 return chart;
191
192 }
193
194 /**
195 * Starting point for the demonstration application.
196 *
197 * @param args ignored.
198 */
199 public static void main(String[] args) {
200 BarChartDemo1 demo = new BarChartDemo1("Bar Chart Demo 1");
201 demo.pack();
202 RefineryUtilities.centerFrameOnScreen(demo);
203 demo.setVisible(true);
204 }
205
206 }